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https://doi.org/10.3390/polym8110404
Title: | Thixotropic supramolecular pectin-poly(ethylene glycol) methacrylate (PEGMA) hydrogels | Authors: | Chan, S.Y Choo, W.S Young, D.J Loh, X.J |
Keywords: | Biodegradable polymers Cerium Crosslinking Cyclodextrins Ethylene glycol Fourier transform infrared spectroscopy Grafting (chemical) Nuclear magnetic resonance Nuclear magnetic resonance spectroscopy Polyethylene glycols Polyethylene oxides Polymerization Polyols Shear thinning Supramolecular chemistry Thermogravimetric analysis Methoxypolyethylene glycol Nuclear magnetic resonance(NMR) Pectin Poly(ethylene glycol) methacrylate Polymerization method Supramolecular hydrogels Thixotropic properties Watersoluble polymers Hydrogels |
Issue Date: | 2016 | Citation: | Chan, S.Y, Choo, W.S, Young, D.J, Loh, X.J (2016). Thixotropic supramolecular pectin-poly(ethylene glycol) methacrylate (PEGMA) hydrogels. Polymers 8 (11) : 404. ScholarBank@NUS Repository. https://doi.org/10.3390/polym8110404 | Rights: | Attribution 4.0 International | Abstract: | Pectin is an anionic, water-soluble polymer predominantly consisting of covalently 1,4-linked ?-D-galacturonic acid units. This naturally occurring, renewable and biodegradable polymer is underutilized in polymer science due to its insolubility in organic solvents, which renders conventional polymerization methods impractical. To circumvent this problem, cerium-initiated radical polymerization was utilized to graft methoxy-poly(ethylene glycol) methacrylate (mPEGMA) onto pectin in water. The copolymers were characterized by 1H nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) spectroscopy and thermogravimetric analysis (TGA), and used in the formation of supramolecular hydrogels through the addition of ?-cyclodextrin (?-CD) to induce crosslinking. These hydrogels possessed thixotropic properties; shear-thinning to liquid upon agitation but settling into gels at rest. In contrast to most of the other hydrogels produced through the use of poly(ethylene glycol) (PEG)-grafted polymers, the pectin-PEGMA/?-CD hydrogels were unaffected by temperature changes. © 2016 by the authors. | Source Title: | Polymers | URI: | https://scholarbank.nus.edu.sg/handle/10635/178757 | ISSN: | 20734360 | DOI: | 10.3390/polym8110404 | Rights: | Attribution 4.0 International |
Appears in Collections: | Elements Staff Publications |
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